// 变量
$baseColor:#ff841d;
// 头部
header {
    height: 50px;
    background-color: $baseColor;
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    // 设置子项在侧轴y轴的对齐方式 
    align-items: center;
    span {
        margin-left: 9rem;
        color: white;
        font-size: 16px;
        margin-top: 8rem;
    }
    .navlogo {
        width: 20px;
        height: 42px;
        background-image: url('../images/icon_bar.png');
        background-position: -199px -18px;
        color: white;
        position: absolute;
        top: 0px;
    }
    .Applogo img {
        width: 40px;
        position: absolute;
        right: 1rem;
        top: 7px;
        display: block;
    }
}